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Nano-Pt Modified Aligned Carbon Nanotube Arrays Are Efficient, Robust, High Surface Area Electrocatalysts

Journal Article


Abstract


  • Heterogeneous, precious metal catalysts in electrochemical

    devices like methanol or H2/O2 fuel cells are typically relatively inefficient per metal atom present. In most metallic

    Pt catalysts, for example, the majority of atoms lie within

    the bulk of the metal and are therefore unable to participate

    in the catalysis. A large scale uptake of current fuel cell

    technology would, consequently, require an annual production of Pt greater than the total mined to date.1

    Pt replacement

    technologies or catalytic structures with greater atom ef-

    ficiency are needed.1

    A possible solution to this problem is

    to thinly coat precious metal catalysts onto electrically

    conducting supports having high surface areas. Carbon

    nanotubes offer important opportunities in this respect. For

    example, metal nanoparticles supported on carbon nanotubes

    exhibit substantial enhancements in catalytic activities,2

    maximum power densities,3,4 and excellent selectivity in

    commercially important processes, such as the electrooxidation of methanol.5

    Of particular interest are perpendicularly

    aligned carbon nanotubes (ACNTs).6

    ACNTs have special

    advantages over their randomly aligned counterparts. These

    include larger and better-defined surface areas, as well as a

    capacity for controlled surface modification using various

    transduction materials.7,8But how could an array of aligned,

    multiwall carbon nanotubes be turned into an electrocatalyst?

    Moreover, would such an array survive the often dramatic

    physical stresses created by mass transport during catalysis?9

    In this work we describe a free-standing, conductive ACNT

    array that, when coated with Pt nanoparticles, acts as an

    efficient and astonishingly robust electrocatalyst.

Publication Date


  • 2008

Citation


  • Liu, Y., Chen, J., Zhang, W., Ma, Z., Swiegers, G., Too, C. O. & Wallace, G. G. (2008). Nano-Pt Modified Aligned Carbon Nanotube Arrays Are Efficient, Robust, High Surface Area Electrocatalysts. Chemistry of Materials, 20 (8), 2603-2605.

Scopus Eid


  • 2-s2.0-43249122390

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4232

Has Global Citation Frequency


Number Of Pages


  • 2

Start Page


  • 2603

End Page


  • 2605

Volume


  • 20

Issue


  • 8

Abstract


  • Heterogeneous, precious metal catalysts in electrochemical

    devices like methanol or H2/O2 fuel cells are typically relatively inefficient per metal atom present. In most metallic

    Pt catalysts, for example, the majority of atoms lie within

    the bulk of the metal and are therefore unable to participate

    in the catalysis. A large scale uptake of current fuel cell

    technology would, consequently, require an annual production of Pt greater than the total mined to date.1

    Pt replacement

    technologies or catalytic structures with greater atom ef-

    ficiency are needed.1

    A possible solution to this problem is

    to thinly coat precious metal catalysts onto electrically

    conducting supports having high surface areas. Carbon

    nanotubes offer important opportunities in this respect. For

    example, metal nanoparticles supported on carbon nanotubes

    exhibit substantial enhancements in catalytic activities,2

    maximum power densities,3,4 and excellent selectivity in

    commercially important processes, such as the electrooxidation of methanol.5

    Of particular interest are perpendicularly

    aligned carbon nanotubes (ACNTs).6

    ACNTs have special

    advantages over their randomly aligned counterparts. These

    include larger and better-defined surface areas, as well as a

    capacity for controlled surface modification using various

    transduction materials.7,8But how could an array of aligned,

    multiwall carbon nanotubes be turned into an electrocatalyst?

    Moreover, would such an array survive the often dramatic

    physical stresses created by mass transport during catalysis?9

    In this work we describe a free-standing, conductive ACNT

    array that, when coated with Pt nanoparticles, acts as an

    efficient and astonishingly robust electrocatalyst.

Publication Date


  • 2008

Citation


  • Liu, Y., Chen, J., Zhang, W., Ma, Z., Swiegers, G., Too, C. O. & Wallace, G. G. (2008). Nano-Pt Modified Aligned Carbon Nanotube Arrays Are Efficient, Robust, High Surface Area Electrocatalysts. Chemistry of Materials, 20 (8), 2603-2605.

Scopus Eid


  • 2-s2.0-43249122390

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4232

Has Global Citation Frequency


Number Of Pages


  • 2

Start Page


  • 2603

End Page


  • 2605

Volume


  • 20

Issue


  • 8